Material-hoist.



N. M. ROSENDAHL.

MATERIAL HOIST.

APPLICATION min APR.29. 1912.

Patented Mar. 21, 1916.

2 SHEETS-SHEET I.

THB COLUMBIA PLANDGRAPH co., WASHINGTON. D. c.

N. M. ROSENDAHL.

MATERIAL Hors.

APPLICATION FILED APR. 29, 9l2. Patented Mar.

2 SHEETS-SHEET 2.

THE COLUMBIA PLANoGnAPH coA, WASHINGTON. D. c.

- ssfrns NILS MATHIAS ROSENDAHL, OF CHICAGO, ILLINOIS, ASSIGNOR TO FREDERICK C. AUSTIN, OF CHICAGO, ILLINOIS.

MATERIAL-HOIST.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed April 29, 1912. Serial No. 693,869.

To all whom it may concern:

Be it known that I, NILs M. RosENDAHL, a citizen of the United States of America, and resident of Chicago, Cook county, Illinois, have invented a certain new and useful Improvement in Material-Hoists, of which the following is a specification.

My invention relates to material hoists of the kind used in buildings for elevating materials from the ground to the different floors of the'building, either while the building is in course Aof construction, or merely for the purpose of carrying materials to the different floors of a building after the construction thereof has been completed.

Generally stated, the object of my invention is to provide an improved and highly efficient material hoist for use in `distributing materials to the diierent floors or levels of a building or other structure.

Special objects are to `provide a material hoist of thiskind in which the bucket is side-tracked to discharge its load at any particular {ioor or level of the structure in connection with which the hoist is employed:

to provide an improved construction andV arrangement whereby the bucket tilts automatically and of its own accord to operate a switch that controls the said side track;

to provide an improved construction and arrangement whereby the switches for the side tracks of the different ioors or levels are manually controlled from the ground, or from a point below, whereby any particular switch can b e locked in one position to keep the bucket or carrier from running onto a certain side track, and in another position to keep the side track open: to provide an improvedy construction and arrangement whereby lthe bucket is Vheld in position for loading. by parallel tracks at the base of the vertical or main track. and is then disengaeed fromcertain of these low`er tracks my invention consists in matters hereinafter set forth and claimed.

- In the accompanying drawings-Figure l 1s a front elevation of a material hoist embodying the principles of my invention,` showing the upper portion thereofl broken away for convenience of illustration. Fig. 2 is a vertical section on line 2-2 of Fig. 1.

las thus illustrated my invention comprises an upright frame or body structure A which provides a shaft in which the bucket B travels up and down. The main track for the bucket consists of a single vertical rail Cat each side of the said shaft or Well, in which the bucket travels up -or down, the said rails being of any suitable known or approved character. In this case, however, each rail is made of channel iron toprovide grooves or ways for the rolls or wheels b and o1 mounted on the sides of the said bucket. At its lower end the track is formed with parallel and inclined portions c and c1 which permit the bucket to stand at the front of the structure while loading, thus facilitating the use thereof. The rolls or wheels Z) travel in the track portions c, there beine` one at each side. and the rolls or wheels o1 travel in the track or section c1, the latter being open at its upper end. The rolls b and o1 are so disposed or located on the sides of the bucket that the latter is heavier at the rear thereof than at its front or outer end. The bucket is provided with another pair of rolls or wheels c2 that travel in the track portions c1 and which are disengaged or released by the upper ends of these track portions when the bucket changes its course in passing onto the main track. At a point above. the track is provided with a side track D which proiects laterally from the main track and which is of such character that it tilts the bucket over to discharge the load therefrom.

The switch E consists of movable track sections e pivoted at el and disposed in position to control the said side switch. A horizontal rock shaft F is mounted upon the front of the frame or structure A and provided with bell crank arms which are connected by rods f1 with the track sections e of the switch. These arms f are provided with weights f2 which tend normally to keep the said switch closed. A locking bolt F', of any suitable character. and preferably controlled by a spring Vwhich .moves it into ed A llt)

position,-Yengages-the said' arm fte hold'it 'and down, disciiargeits load:A several times in either position, whereby the switcli^is--atmay-particular fiooiyor it may rise and locked in either closed or'open position. As

shown in Fig. 2 the said switch is locked inV closed position by reason of the fact that the bolt f3 is in engagement with the upper edge of the arm 'When the said shaft is rocked `and the arins ,f are moved to positions shown in dotted lines, the locking bolt f3 then engages the lower edge of the arm f, thereby .locking the switch in oben position. A

sheave f* is mounted upon the frame or structure A, and the saidbolt f3 is provided with an operating cord or chain which runs oier the said sheave and hangs down to a point where it can be grasped andoperated by a person standing cn the ground.

The bucket may be of any suitable or desired construction, and is operated in any suitable manner, an operating line or cable Gr being Vordinarily provided for this purpose. When the bucket starts upward, after being; loaded, the rolls or wheels c2 leave the 4upper end of the track porticns c1 and the rolls or wheels b and b1 then travel upwart 4iii V the rails of the vertical or main track,

and ifrthe side switch is closed, the bucket or carrier will pass the side track. If, however, it is desired that the bucket shall discharge its load at the floor or level at which the said side track is located, the operator or attendant will then pull the cord or chain f5 to unlock the switch, and as soon as the upper rolls or wheels of the bucket encounter the switch, the preponderance of weight at the inner side of the bucket will cause it to tilt over in this direction.- This tilting motion of the bucket causes the rolls or wheels Z) to move the switch into open position, as shown in dotted lines inv Fig. 2, and

Vthe bucket then moves out upon the side `track and proceeds to dump its load, in the manner shown in dotted lines in Fig. 2. The operator or attendant manipulates the cord or chain for the purpose of lockingl the switch in, open position, and thusthe bucket will travel backward upon'theside track and be free to return to the main track after it has discharged its load.

The'v main track may haveas many side tracks and switches therefor as are found necessary for any particular purpose. The track is made in sections. as shown, the sections beingl joined together by the `biacket plates H, whereby the track can be made higher from time to time as the construction of the building progresses, and in this way the materials can be hoisted and delivered to any particular fioor. 1 7

All of the switches of the different side tracks are controllable from the ground or from a point below, and thus the operator oi' attendant can control the hoist and cause the material to be discharged at any desired floor or level. rfhe bucket may operate up dischargeits load at one fioorandthen Vdis.-

chargc thenext load at another lioor. Each` for deflectiiig` the upwardly moving carrier from the said main track, adapted to Vpermit the carrier to pass upward when the point of delivery is higher, and a lswitch forV said side track, automatically operatedl by. 'tilting motion of Saidcarrier.

l 2. A material hoist comprising 1a carrier, a .main track therefor, a side track for dellecting-the carrier fromV the said main track,

' and a switch for said sidewtrack, autoinatically operated by the said carrier, saidA main track having' two parallel portions forkeep,-

ine, the carrierin position while lcadingone said portion having an `open end andsaid f carrier having wheels engagingsaid tracks, one or more. of said wheels being` released by .said open end to permitrthe carrier to change its course in passing from the said portions .to another section of the inain track, and to permit the carrier, to then ascend the main'track. y' f u v3. A material hoist comprising a carrier, a main track therefor, and a side track for ioo deflectiiig the carrier from the said. mainV Y track, a switch fcr said sidetrack,.ineans whereby said carrier tilts of itsown accord to automatically and by its weightrshift said switch t0 side track positionwliile traveling upward, and meansfcr locking said switch in either open or closed position.

a. A material hoist comprising a carrier, a main track therefor,l a side'tra'ck for deflecting the carrier frrin the said main track. and a switch for said side track, automati-l cally `shifted by the weightiof said carrier, said main `track being disposed upright, and

said c arrier. consisting; of a bucket held .inV dumping' position bythe sidetrack.

5. A material hoist comprising a carrier, a maintrack tlierefcr, aside track for deilecting the carrier from the said main track, and a switch vfor said side track, automatically operated. by the said earrieigvsaid main track having two parallel portions for keeping` the Vcarrier in position while loading,Y

llo

one ofsaid portions beine; open at 'the end thereof, Vand said carrier having wheels engagingsaid tracks, one or more of said wheels being released by wsaid open end to permit the carrier to change its courseinV passing-frein the said portionsof the main track, and to permitY saidcarrieifto then ascend-the said main track,1 saidma in track iso l Vsition by the side track, said switch being operated by one or more of said wheels while thecarrier is moving upward.

6.,A material hoist comprising a carrier,

a main track therefor, and a side track for deflecting the carrier from the said main track, a switch for said side track, and means whereby said bucket tilts of its own accord `toautomatically and by its weight operate -said switch to side track position, said main track being disposedupright, and said carrier consisting of a bucket heldin dumping position and against tilting by the side track. i

7. A material `hoist comprising'a carrier, a main track therefor, a side track for dcflecting the carrier from the said main track,

land a switch =for said` 'side track, automatically operated by the said carrier, said Vrnain track being disposed upright, and said Acarrier consisting of a bucket held indumping position by the side track, whereby the -inateria'ls are discharged Vat a certain oor of therbuilding, a similar side track and vswitch equipment for another floor of the building, and means forcontrolling sald switches from below, whereby the carrier may pass any side track in either direction.

8. A material hoist comprising a carrier, a main track therefor, a side track for deilecting the carrier from the said main track, and a switch for said side track, automatically operated by the said carrier, said main track having two parallel portions for. keeping the carrier in position while loading, one of said portions being open at the end thereof, and said carrier having wheels released by said open end to permit the carrier to change its course in passing from the said portion of the main'track, and to then ascend the main track, said main track being disposed upright, and said carrier consisting of a bucket held in dumping position by the said track whereby the materials are discharged at a certain floor of the building, a similar side track and switch equipment for another floor of the building. and means for controlling said switches from below, whereby the carrier may pass any side track in either direction.

9. A material hoist comprising a carrier, a main track therefor, a side track for deflecting the carrier froml the said main track, a switch for said side track, and means whereby said bucket tilts of its own accord to automatically operate said switch to side track position, said main track bel ing disposed upright, and said carrier consisting of a bucket held in dumping posi tion lov the side track, whereby the materials are discharged at a certain floor of the building. a similar side track and switch and means for' controlling said switches from below, whereby the 'carrier may pass any side track in either direction.

l0. A material hoist comprising a car.- rier, a main track therefor, a side track for deiiecting the carrier from the said main track, and a switch for said side track, automatically operated by the said carrier, said main track being' disposed upright, and said carrier consisting of a bucket held in dumping position by thel side track, and a manually controlled lock for the switch.

11. A material hoist comprising a carrier, a main track therefor, and a side track for deflecting the carrier from the said main track, a switch for said side track, automatically operated by the said carrier, said main track having two parallel portions for keeping the carrier in position while loading, one of said portions being open at the end thereof, and said carrier having wheels engaging said tracks, one or more of said wheels being released by said open end to permit the carrier to change its course in passing from the said portion of the main track, said main track being disposed upright, and said carrier consisting of a bucket held in dumping position by the rside track, and a manually controlled lock Vforthe switch.

l2.' A material hoist comprising a carrier, a main track therefor, a side track for deflecting the carrier from the said main track, a switch for said side track, and means whereby said bucket tilts of its own accord to automatically operate said switch to side track position, said main track being disposed upright, and said carrier consisting of a bucket held in dumping position bv the side track, and a manually controlled lock for the switch.

13. A hoisting apparatus Vcomprising a hoisting bucket, an upright main track provided with a lateral deflection at the lower end thereof, to carry the bucket bodily sidewise into loading position, and means for holding the bucket against tilting while in loading position, said means including` an auxiliary track, said bucket having wheels for engaging said main track, one said wheel at each side'of the bucket engaging the auxiliary track when the bucket moves into loading position.

14. A hoisting apparatus comprising a hoisting bucket, an upright main track provided with a lateral deflection at the lower end thereof. to carry the bucket bodily sidewise into loading position, and means for holding the bucket against tilting while in loading position, said means including an auxiliary track communicating with said main track, and said bucket having means for engaging` both said tracks, said bucket haring a wheel at each side thereof which passes from the main track to the auxiliary track when the bucket moves intoload''ng position.

15. A hoisting apparatus comprising a ,hoisting bucket, an upright track provided with a lateral deflection at the lower end thereof, to carry'the bucket bodily sidewise into loading position, and means for holding the bucket against tilting while in loading position, said means including; 4an auxiliary track which releases the bucket to permit the latter to ascend said first mentioned track.

16. A material hoist comprising a runwav extending` upward, a bucket arranged to travel up and down in said runway, a

dumping side track for causing the bucket i Vto tllt about a horizontal axis, a switch movable automatically to switching position for taking the upwardly moving bucket onto the side track, and means for controlling the switch at will.

. 17. A material hoist comprising a run- Vway extending' upward, a bucketv arranged way extending upward, al bucket arranged Copies of this patent may be obtained for ve cents each. by addressing the Commissioner of Patents,V

-tot'ravel up` and downin said runwayya dumping side track for causing the bucket operated by the weight` of the loadv for taking' the upwardly movingr bucket onto"V the side track, Vand a locking device forV holding` said switch ineither open or closed position.

19. A material hoistcomprisingr a runway extending upward, a bucket arrangjlfedV to travel up and down 1n said runway, a dumping side track for causing'the bucket to tilt about a horizontal axis, a switch op? erated by the weight of the load for taking the upwardlv moving bucket onto the side track. a weight for operating theswitch to closed position, and'means for locking 35 to tilt about a horizontal axis, Va switchV said weight position to keep the switch track. said switch beingIr pivoted at its lowerv end to tilt with-the weight'of Vthe bucket to side track position. V

Signed bv me at .(lliicar'o,YV Illinois, this 26th dav of April 191:2. Y

NTLS MATHIAS ROSENDAHL.VV Witnesses:

H. D. TRUTE, GEO. F. SCHMIDT.

Washington, D. C. 

